A 7 GHz radio wave is emitted from a galaxy and is observed to be 5 GHz. Calculate the redshift of the galaxy.
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- Redshift takes place when the source of electromagnetic radiation moves away from the observer. This shifts the wavelength to the red side and will decrease the frequency.
- Redshift can be calculated from frequency using the following formula,
Here fobs is the observed frequency and femit is the emitted frequency.
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